SCORAD Calculator
The SCORAD index measures the severity of atopic dermatitis (eczema) by combining the extent of affected skin, the intensity of six clinical signs, and two patient-reported symptoms. Enter your values to get a score out of 103 with a mild, moderate, or severe classification, plus a step-by-step breakdown of how the score is built.
Formula
Worked example
A patient has 20% of body area affected (A=20), mild erythema, mild edema, no oozing, mild excoriation, no lichenification and mild dryness (B=4), with itch rated 6 and sleep loss rated 4 (C=10). SCORAD = 20/5 + 7x4/2 + 10 = 4 + 14 + 10 = 28. This falls in the moderate range.
What is the SCORAD index?
SCORAD (SCORing Atopic Dermatitis) is the most widely used standardized tool for measuring the severity of atopic dermatitis (eczema). It was developed and validated by the European Task Force on Atopic Dermatitis (ETFAD) in 1993 and has since been adopted in clinical trials, dermatology practice, and treatment guidelines worldwide. The index combines three components: the extent of affected skin (Component A), the intensity of six clinical signs assessed on a representative lesion (Component B), and two patient-reported subjective symptoms over the past three days (Component C). The final score ranges from 0 to 103, where higher values represent greater disease burden.
How to use this SCORAD calculator
Work through the three sections in order. First, estimate the percentage of each body region that shows active eczema lesions - you can use the rule of nines as a guide (head and neck 9%, each arm 9%, anterior trunk 18%, back 18%, each leg 18%, genitals 1%). Next, rate the severity of each of the six clinical signs (erythema, edema, oozing/crusting, excoriation, lichenification, and dryness) from 0 (absent) to 3 (severe). These signs should be assessed on a representative lesion, not the worst area. Finally, rate average itch intensity and sleep disturbance over the past three days on a 0-10 scale. The total SCORAD and each component contribution update as you enter values.
Understanding the three SCORAD components
Component A is the affected body area, expressed as a percentage of total body surface. The rule of nines divides the body into regions of approximately 9% each. A is divided by 5 in the formula, so it contributes a maximum of 20 points to the total. Component B is the sum of six intensity items, each graded 0-3 on a representative area of skin. The six signs are erythema (redness), edema/papulation (swelling), oozing or crusting, excoriation (scratch marks), lichenification (skin thickening), and dryness. The sum B can range from 0 to 18. In the formula, B is multiplied by 7/2, giving it a maximum contribution of 63 points - roughly 60% of the maximum score. Component C is the sum of itch intensity and sleep disturbance, each reported by the patient on a visual analogue scale of 0-10 for the past three days. C ranges from 0 to 20 and enters the formula directly, contributing up to 20 points.
Clinical applications and limitations
SCORAD is used in clinical practice to set a baseline, track response to treatment, and guide step-up or step-down decisions in therapy. A change of 8.7 points is considered the minimal clinically important difference (MCID) in adults. The tool is validated for both adults and children, though pediatric patients under 10 years have proportionally larger head surface areas, which should be reflected in the body region estimates. SCORAD reflects disease activity at a single point in time; for tracking over time, regular re-assessments every 4-12 weeks are recommended. The tool does not replace a clinical assessment - factors such as distribution, triggers, comorbidities, and treatment history all inform management decisions.
SCORAD severity classification
| SCORAD range | Severity | Typical management |
|---|---|---|
| 0-24 | Mild | Emollients, mild topical corticosteroids |
| 25-50 | Moderate | Mid-potency topical therapy, calcineurin inhibitors |
| 51-103 | Severe | High-potency topicals, systemic treatment, dermatology referral |
Classification thresholds defined by the European Task Force on Atopic Dermatitis (ETFAD).
Frequently asked questions
What is a normal or good SCORAD score?
A SCORAD below 25 is classified as mild atopic dermatitis. Scores between 25 and 50 are moderate, and scores above 50 are severe. A score of 0 would mean no lesions, no intensity signs, and no itch or sleep disturbance - essentially clear skin. For most people with active eczema, the goal of treatment is to get below 25 and ideally below 10.
How is the affected body area estimated?
The standard method is the rule of nines, which divides the adult body into regions that are each approximately 9% of total body surface area: the head and neck (9%), each upper limb (9%), the anterior trunk (18%), the back (18%), each lower limb (18%), and the genitals (1%). For each region, you estimate what percentage of that region is actively affected. Children under 10 have a proportionally larger head and smaller legs, so adjusted charts are sometimes used.
What is the difference between SCORAD and EASI?
Both measure atopic dermatitis severity, but they differ in structure. EASI (Eczema Area and Severity Index) uses four body regions and four intensity signs without a subjective component, making it purely observer-rated and slightly faster to complete. SCORAD uses six intensity signs and includes subjective symptoms (itch and sleep loss) from the patient, giving it a broader picture of disease burden. In clinical trials, both are widely accepted and have been shown to correlate well.
Can I use this SCORAD calculator for children?
Yes, SCORAD is validated for pediatric patients. The formula and intensity scoring are the same. The main adjustment for young children is that the head represents a larger proportion of total body surface - closer to 18% in infants - so the body area estimates should reflect the patient's actual age-adjusted proportions rather than the adult rule of nines.
How often should I calculate my SCORAD?
For routine monitoring in clinical practice, SCORAD is often assessed at each clinic visit or every 4-12 weeks during treatment. During a flare or when starting a new therapy, monthly assessments help track treatment response. At home, patients can use simplified versions to self-monitor, though full SCORAD requires a trained observer for the intensity component.
What is the minimum clinically important difference for SCORAD?
Studies suggest that a change of approximately 8.7 points represents the smallest difference that patients notice as meaningful. In clinical trials, a reduction from baseline of 50% (SCORAD-50) or 75% (SCORAD-75) is often used as a responder threshold, similar to PASI-50 and PASI-75 used in psoriasis.